Discovery of 505-million-year old chitin in the basal demosponge Vauxia gracilenta.
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Ehrlich H, et al. Among authors: tsurkan mv.
Sci Rep. 2013 Dec 13;3:3497. doi: 10.1038/srep03497.
Sci Rep. 2013.
PMID: 24336573
Free PMC article.